Best open-source alternatives to Microsoft OneDrive

Syncthing is a peer-to-peer file synchronization tool designed to keep files consistent across multiple computers without relying on a central cloud service. The README emphasizes safety, security, ease of use, and automatic operation, positioning the project for individual users who want reliable syncing with minimal manual intervention. The project provides guidance for getting started, building from source, and running in Docker, and it references GUI wrappers for Windows, macOS, and Linux. It also points users to a dedicated documentation site, a forum, and a GitHub issue tracker for support and bug reports. The software is released under the MPLv2 license and includes signed release binaries, with an automatic upgrade mechanism mentioned in the README.